Remove obsolete Group tag

References: https://fedoraproject.org/wiki/Changes/Remove_Group_Tag

openbox.spec

@@ -3,7 +3,6 @@ Version:	3.6.1
 Release:	10%{?dist}
 Summary:	A highly configurable and standards-compliant X11 window manager
 
-Group:		User Interface/Desktops
 License:	GPLv2+
 URL:		http://openbox.org
 Source0:	http://openbox.org/dist/%{name}/%{name}-%{version}.tar.xz
@@ -58,7 +57,6 @@ package.
 
 %package	devel
 Summary:	Development files for %{name}
-Group:		Development/Libraries
 Requires:	%{name}-libs%{?_isa} = %{version}-%{release}
 Requires:	pkgconfig
 Requires:	pango-devel
@@ -72,7 +70,6 @@ developing applications that use %{name}.
 
 %package	libs
 Summary:	Shared libraries for %{name}
-Group:		Development/Libraries
 
 %description	libs
 The %{name}-libs package contains shared libraries used by %{name}.
@@ -80,7 +77,6 @@ The %{name}-libs package contains shared libraries used by %{name}.
 
 %package	kde
 Summary:	KDE integration for %{name}
-Group:		User Interface/Desktops
 Requires:	%{name} = %{version}-%{release}
 %if 0%{?fedora} > 21
 Requires:	plasma-workspace